C1.18b Oxidation and reduction
For Year 9 oxidation means the gain of oxygen and reduction means the loss of oxygen.
(We will use more advanced definitions in Year 10 and beyond).
In each of the following reactions, decide whether the substance shown in bold is oxidised or reduced.
1 aluminium oxide → aluminium + oxygen __________
2 nickel + oxygen → nickel oxide __________
3 carbon + zinc oxide → carbon dioxide + zinc __________
4 iron oxide + hydrogen → iron + water __________
5 aluminium + chromium oxide → aluminium oxide + chromium __________
6 aluminium + oxygen → aluminium oxide __________
7 hydrogen + copper oxide → copper + water __________
8 calcium oxide → calcium + oxygen __________
9 tungsten oxide + hydrogen → tungsten + water __________
10 magnesium + iron oxide → magnesium oxide + iron __________
Now copy the equations into your notes with the following key.